Can I replace the steering fluid with hydraulic fluid? Actually the steering gear works the same as the hydraulic system. Can it be replaced please ?

No. The composition of this oil however, I can replace, if the use of hydraulic oil will lead to faster wear inside the steering wheel, affecting the life of the engine when.

Power steering fluid is a special fluid used inside the power steering pump of the car, through the hydraulic effect, can make the steering wheel become very light, similar to the automatic transmission fluid, brake fluid, as well as shock absorption fluid.

Power steering is a new technology to increase the comfort of the car, the driver can automatically provide steering force when steering, thus reducing the driver's steering labor intensity, and power steering fluid is injected into the power steering system inside a medium oil, play a role in transferring the steering force and cushioning.